Using the Gross Regional Domestic Product data for 10 East Asian countries, this study shows that East Asia as a whole tends to converge in terms of per capita income. Far stronger evidence in favor of real growth convergence is observed if Northeast Asia is considered separately, while we cannot find any clear tendency of convergence for ASEAN 5 countries (Indonesia, Malaysia, Singapore, the Philippines and Thailand). This result may reinforce a brighter prospect for furthering economic and monetary integration in Northeast Asia. We can observe there are still relatively wider income disparities among regions and nations in East Asia than within Europe, suggesting that a common effort to reduce the income gap is needed for deeper integration. If income disparity continues between some East Asian countries, it can lead to the isolation of economically depressed regions or countries from a given union, which may then jeopardize the East Asian economic integration process itself. (The rest is omitted.)

I. Introduction
II. Methodology and Data
1. Methodology
2. Data
III. Convergence in Europe
1. Convergence pattern at the National level
2. Convergence pattern at the Regional level
IV. East Asian Convergence at the National level
V. Convergence in East Asia at the Regional level
1. Convergence across nations
2. Convergence within nations
VI. Conclusion

References
Appendix